Elevator



April 2o, 1926. 1,581,270

c.`KN|s1 EY ELEVATOR Filed Jan. 50, r192s 43 "l" 4 m "Jill "W v PatentedApr. 20, 1926.

UNITED STATES PATENT OFFICE.

CLYDE KNISLEY, OF HUNTINGTON BEACH, CALIFORNIA.

ELEVATOR.

Application led January 30, 1925. Serial No. 51,758.

To all whom t may concern.'

Be it known that I, CLYDE KNIsLnY, a citizen of the United States,residing at Huntington Beach, in the county of Orange and State ofCalifornia, have invented new and useful Improvements in Elevators, ofwhich the following is a specification.

This invention relates to improvements in elevators used in raising andlowering drill pipe and the like in well drilling operations.

It is an object of the invention to provide an improved elevatorv havinga body upon which there is a swinging or hinged door; to provide animproved latch construction for locking the door in closed position; andto provide means whereby when the handle is pulled so as to open thedoor, the latch will be simultaneously thrown into released or openingposition.

A further object of the invention is to provide an elevator havin a bodyand a hinged door; and to provide a trigger device adapted to be engagedby a portion of the door u on being swung open, so that the door may lietemporarily heldin open posiltion. The trigger device is so arrangedthat when the body is placed about or'caused to engage a section ofdrill pipe, the trigger device will release the door and enable it to beautomatically swung into closed position.

lVith the foregoing and other objects in view which will be made'manifest in the following detailed description and pointed out in theappended claims, reference is had to the accompanying drawings for anillustrative embodiment of the invention, where- 1n:

Figure 1 is a top plan view of the improved elevator, arts `being brokenaway and shown in horizontal section;

Fig 2 is a vertical section through the handle of the door oftheelevator and is taken substantially on the line 2--2 of Fig. l; Fig 3 isa front elevation of the elevator,

the door being shown in closed position;

Fig. 4 is a detail in elevation taken-sub.-

lstantially in the direction ofthe arrow 4 up on Fig. 1; and

Fig. 5 is a front elevation showing the improved elevator in appliedposition.

Referring to the accompanying drawings wherein similar referencecharacters designate similar parts throughout, theim roved elevatorconsists of a semi-,cylindriea body 10, which has formed upon itsopposite ends per and lower lips 20.

lugs 11 and 12, the lugs 11 being up er lugs and the lugs 12 being lowerlugs. ver the ends of the upper and lower lugs 11 and 12 there areplaced sheet metal caps 13, which are preferably U-shaped in crosssection and have portions 13 which extend over the top and bottom of theupper and lower lugs 11 and 12 respectively. Bolts 14 pass through theupper and lower lugs 11 and 12 and serve to maintain the caps 13 uponthe body. The bolts 14 enable the lower lugs 12 to assume a portion ofthe strain applied to the elevator by the bails B which pass through theapertures 15 defined by the upper and lower lugs and the bolts 14.

-A door 16 is hinged to the body 10 by means of a pin or rivet 17. Asclearly shown in Fig. 1, the interior surface of the body v10 istangential to the circular part, as indicated at 18, opposite theswinging end of the door 16, and the door 16 is provided with i a lip 19fitting in the recess provided by the tangential surface 18 and the pipeP. From the front face of the body 10 there' extend lugs or lips 20 andthe swinging end of the door 16 is adapted to slide between the up- Thisswingingend hasformed thereon a handle 21.

A' latch member 22 is slidable in a bore 23 formed in the top of thehandle and this latch member has formed thereon an annular flange 24,against which bears the upper end of a coil spring 25. The lower end ofthe coil spring 25 is kept in proper osition upon the handle 21 by meansof) a pin 26. Ears 27 are formed upon the handle, and an angular lever28 is pivoted between these ears as indicated at 29. The upper end ofthe latch member 22 is adapted to occupy a recess 30' formed upon theunder side of the upper lug 20. Preferably the u per end of the latchmember 22 is provi ed with an inclined surface 31 to facilitate forcingthe' latch member 22 downwardly within the handle upon engagement withthe forward surface of the upper lug 20, enabling the door to be slammedor` thrown shut. The

latch 22 is also preferably provided with an yinclined surface 32, whichcooperates with pivotedas at 38, which constitutes a type of trigger.vThe lever 37 is provided with a hooked end 39 and with an engagingportioh 40. A bore 41 may be formed in the back of the body 10, in whichthere is disposed a coil spring 42 and a suitable plug 43. About the pin17 there is wound a coil spring 44. whaving one end bearing upon thefront surface of the door 16 and the other end bearing upon one of thelower lugs 12. The spring 44 urges the door 16 into closed position.

The operation of the elevator is as follows: Upon placing the hand uponthe handle 21 and giving an outward pull to the handle, the angularlever 28 will be actuated so as to retract the latch member from therecess 30, enabling the door to be opened. The door may then be swungopen and when being moved into full open position, the hooked end 39 ofthe lever 37 will move into the aperture 85 in the finger 34. The pipe Pmay then be withdrawn from the body, and as the coil spring 42 bearsupon the lever 37,' the hooked end 39 will be maintained in engagementwith the edge 39a upon the linger 34. In this manner the door 16 may betemporarily held in open position against the action of the spring 44.l/Vhen the body 10 is swung into engagement with the pipe P So as tocause the engaging portion 40 of the lever 37 to contact with it, and tobe forced backwardly against the action of the coil spring 41, thehooked end 39 of the lever 37 will disengage from the edge 39a, andenable the door 16 to be swung into closed position by the coil spring44. Upon the front face of the door 16, there is mount ed a hook 45 andthe end of the spring 44 which bears against the lower lug 12, can beswung over against the front Jface of the door 16 and placed beneath thehook 45. In this manner, the door will be allowed to swing freelywithout being under the `action of the spring 44, if so desired.

It will be understood that various changes in the detail of constructionma be made without departing from the spirit or scope of the inventionas defined by the appended claims.

I claim:

1. An elevator for drill pipe and the like having a body and asu/ingingdoor, a trigger mounted upon said body, means associatedl with said dooradapted to be engaged by said trigger upon swinging the door open,whereby said door may be temporarily maintained in open position by saidtr' ger, 'and door closing means urging said oor into closed position,said trigger being so arranged that contact with a pipe or similarobject will release said door lso as to be closed by said door closingmeans.

2. An elevator for drill pipe and the like having a body and a swingingdoor hinged thereto, a trigger device mounted within said body, a fingerprovided upon said door adapted to engage said trigger device uponswinging the door into open position, whereby said door may betemporarily held in open position byl said trigger device, and springmeans for urging said door into closed position, said trigger devicebeing yso arranged that engagement of said body about a drill pipe orthe like will actuate it so as to release said door. v

3. An elevator for drill pipe and the like comprising a body, a doorhinged to said body, spring means for normallv urging said door intoclosed position, holding means adapted to temporarily hold said doorwhen swung into open osition, and means for releasing said holdingmeans, said door being provided with a spring actuated latch adapted tolock said door in closed position.

4. An elevator for drill pipe and thelike comprising a body, a doorhinged to the body, a handle upon said door, a latch mounted upon saidhandle, means associated with said latch and mounted u on said handle,whereby an opening pu l npon said handle will cause said latch torelease, and means urging said door into closed position.

5. An elevator for drill pi e and the like comprising a body, a dooringed to said body, a handle upon the door, a latch engageable upon thehandle adapted to engage Said body to lock the door in closed position,spring means for urging the latch into locking position, and a pivotedlever mounted upon said handle for moving the latch into releasingposition.

In testimony whereof Ihave signed my name to this specification,

o. itinerant.`

